3-56 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
When motorcycle is down, if opening of the throttle valve
is 3/8 or more, stop the engine after 3 seconds. If throt-
tle valve opening is 3/8 or less, hold the engine speed at
3000rpm for 3 seconds after the motorcycle fell over the 3
seconds, then stop the engine.
When the vehicle-down sensor is broken, the engine will
start though stop it at 3 seconds.
Vehicle-down Sensor Removal
Never drop the vehicle-down sensor, especially on
a hard surface. Such a shock to the sensor can
Left Radiator Shroud (see Radiator Shroud Removal in
the Frame chapter)
Pull the vehicle-down sensor [A] from the frame bracket.
Disconnect the connector [B].
Vehicle-down Sensor Installation
The UPPER mark [A] of the sensor should face upward
and install the sensor.
Connect the connector.
Incorrect installation of the vehicle-down sensor
could cause sudden loss of engine power. The
rider could lose balance during certain riding situ-
ations like leaning over in a turn with the potential
for an accident resulting in injury or death. Ensure
that the vehicle-down sensor is held in place by the
Vehicle-down Sensor Input Voltage Inspection
Be sure the battery is fully charged.
Remove the left radiator shroud (see Radiator Shroud Re-
moval in the Frame chapter).
Disconnect the vehicle-down sensor connector and con-
nect the harness adapter [A] between these connectors
Main Harness [B]
Vehicle-down Sensor [C]
Special Tool - Measuring Adapter: 57001-1700
Connect a digital meter [D] to the harness adapter leads.
Vehicle-down Sensor Input Voltage
Connections to Adapter:
Digital Meter (+) → R (sensor R/Y) lead
Digital Meter (–) → BK (sensor GY) lead